GameZebo: There are plenty of social games that ask you to take care of animals. Sometimes it’s as part of a farm, sometimes they’re simply pets for you to raise. But most of the time you’re not really raising them for any particular reason; there’s usually not much of an end goal in mind. And that’s part of what makes Derby Days stand out. While much of the gameplay mechanics will be familiar, the process of turning a fledgling racehorse into a champion is very satisfying.